There are no hard-and-fast rules for tagging. Here are some individual perspectives.
[- rickla Aug 21, 2009] I've tagged most of the chapter pages in the wiki to get things started. The principles I've tried to follow at this stage are:
Err on the side of too many tags rather than too few. If necessary, tags can be merged later.
In general, assume that different terms in different chapters mean at least subtly different things, rather than being mere terminological inconsistencies.
Use plural forms for concrete nouns and singular forms for abstract nouns.
If two or more variants of a tag suggest themselves, either use them all or use the one that is in the most use on other pages.
Use multi-word tags without shame! I regard tagging systems that prohibit multi-word tags (such as delicious and CiteULike) as primitive (though I hasten to add that I love both of those services) and insufficiently focused on user-friendliness, and think that human-readable chunks like communities of practice make excellent tags.
I'm not convinced that those have all been sound decisions: fewer clusters have emerged than I expected, probably because of my reluctance to impose a pre-existing schema on a diverse range of topics. I'm hoping others can build on my initial tagging, adding tags as appropriate that they've seen on other pages where commonalities obviously exist.
Tagging the Collaborative Book(s)
There are no hard-and-fast rules for tagging. Here are some individual perspectives.
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I'm not convinced that those have all been sound decisions: fewer clusters have emerged than I expected, probably because of my reluctance to impose a pre-existing schema on a diverse range of topics. I'm hoping others can build on my initial tagging, adding tags as appropriate that they've seen on other pages where commonalities obviously exist.